What are some ingredient suggestions to put into my fondue cheese to enhance the flavor?

Classic Alpine                          Aged Cheddar

Cracked Pepper                        Chopped Jalapenos

Nutmeg                                    Basil Pesto

Fresh Lemon                            Salsa

Chopped Garlic                        Cooked Bacon

Worcestershire                         Beer

Chopped Jalapenos

Cooked Bacon